In this paper

the seismic demand spectra are obtained based om Specifications for Earthquake Resistant Design for Highway Engineering（JTJ 004-89）.The Push-over analysis method is employed to study capacity cover and earthquake performance of practical bridge structures according to earthquake damage characteristics of bridge structures.It is straightforward to assess seismic vulnerability of real bridge structure by employing seismic demand.This study will provide referrence for earthquake-resistant capacity decision in practical bridge structure.